// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Touch-sampled crescent cutout
// Not compiled or tested in-world
// Setup: Put in a spare ordinary cube you own. Touch different places on one face to sample the procedural pattern at live surface coordinates. Edit the constants to design a pattern.
// Stop / restore: Disable/remove. Only private owner messages are produced; no texture or tint is applied.
// Notes: The max combination performs a hard difference of ideal signed-distance regions; it does not modify a prim. Surface coordinates depend on the viewer and mesh; ordinary prim faces are the clearest test surface.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Live surface-coordinate sampler.
float OUTER_RADIUS=0.7;
float CUT_RADIUS=0.6;
vector CUT_OFFSET=<0.3,0.15,0.0>;
default
{
    touch_start(integer detectedCount)
    {
        if(llDetectedKey(0)!=llGetOwner())return;
        vector uv=llDetectedTouchST(0);
        if(llDetectedTouchFace(0)<0||uv==TOUCH_INVALID_TEXCOORD)
        {
            llOwnerSay("Surface coordinates unavailable.");
            return;
        }
        vector p=2.0*uv-<1.0,1.0,0.0>;
        if(OUTER_RADIUS<=0.0||CUT_RADIUS<=0.0)
        {
            llOwnerSay("Positive radii required.");
            return;
        }
        float outer=llVecMag(p)-OUTER_RADIUS;
        float cut=llVecDist(p,CUT_OFFSET)-CUT_RADIUS;
        float distance=outer;
        if(-cut>distance)distance=-cut;
        llOwnerSay("Crescent mask="+(string)(distance<=0.0)+" field="+(string)distance);
    }
}